In addition to the technical and economic advantages of blasting rocks from open-pit mining, this method extraction can produce effects with a direct impact in area near open pit. Blasting works generates such as seismic waves that cause vibrations, rock throws, noise toxic gases. When their intensity scope are not systematically evaluated analysed, serious consequences for people, civil / indu...

Abstract Fracture control blasting produces rock fractures in the desired direction, which is significant for stability of excavation structures engineering. The present study proposes a new method fracture using air–water coupling. This utilizes difference explosion stress transfer between air and water, guides energy consumption fracturing on water-coupling side, i.e. zone, thus zone properly...

Inhalation of silica dust is associated with pulmonary fibrosis. Therefore, substitute abrasive materials have been suggested for use in abrasive blasting operations. To date, toxicological evaluation of most substitute abrasives has been incomplete. Therefore, the objective of this study was to compare the pulmonary toxicity of a set of substitute abrasives (garnet, staurolite, coal slag, spec...

In this paper, a practical project of subway tunnel lining demolition via blasting for the construction station under action load and weight collapsed rock mass was proposed. The overbreak underbreak quality, failure mechanism structure, particle peak velocity (PPV), stress evolution law surrounding caused by were researched using LS-DYNA. Firstly, results show that parameters presented in pape...

The Trauzl test is widely used to measure the explosive power of a substance by determining volume increase produced detonation tested charge in cavity lead block with defined quality and size. In this study, high-speed 3D digital image correlation (3D-DIC) system were evaluate effect stemming on blast hole. blasting experiments conducted emulsion explosives. materials adopted study sand, aggre...

Underground gas storage are often subject to external dynamic loads, blast vibrations, and seismic disturbances, since they function as backup areas for the strategic national energy reserve, supply demand dispatch, storage. Currently, research on response characteristics, stability, disturbance control of underground storages under loads is still incomplete great practical importance ensure se...

Blasting vibration could cause dynamic instability of rock masses within a critical steady state. To control the blasting vibration, it is necessary to understand complete response process under vibration. The Long Short-Term Memory (LSTM) technique uses blast monitoring data predict full waveform Based on LSTM, new prediction model proposed in this study. verify feasibility model, sample were ...

Precise control of casting velocity and effective throwing kinetic energy conversion efficiency in blasting engineering are challenges. To provide a theoretical basis reference for the implementation plan fine construction cast project, we study problems consumption ratio broken rock under impact load explosions this manuscript. The calculation methods two modes spherical charge cylindrical est...

This study investigated the feasibility of the micro powder blasting technique for the micro fabrication of sensor structures using the Pyrex glass to replace the existing silicon-based acceleration sensor fabrication processes. As the preliminary experiments, the effects of the blasting pressure, the mass flow rate of abrasive and the number of nozzle scanning times on erosion depth of the Pyr...